High voltage transmission results in lower current and hence lower heat loss. AC is preferred over DC because

Voltage level transformation is easier in AC at same power levels.

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Voltage level transformation is easier in DC at same power levels.

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AC Voltage levels are always greater than DC Voltage levels.

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None of the above

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Solution

The correct option is A Voltage level transformation is easier in AC at same power levels.
Voltage level Transformation is easier in AC with the help of transformers.

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Similar questions

Q. Statement A: Step up transformer converts low voltage, high current to high voltage, low current.
Statement B: Transformer works on both ac and dc.

Q. AC is used for long distance power transmission instead of DC because it is more convenient to step up/down voltage for AC than DC.

Q. A transformer is designed to convert an AC voltage of 220 V to an AC voltage of 12 V. If the input terminals are connected to a DC voltage of 220 V, the transformer usually burns. Explain.

Q. Assertion :A torch bulb give light if operated on AC of same voltage and current as DC. Reason: Heating effect is common to both AC and DC.

Do the same exercise as above with the replacement of the earlier transformer by a 40,000-220 V step-down transformer (Neglect, as before, leakage losses though this may not be a good assumption any longer because of the very high voltage transmission involved). Hence, explain why high voltage transmission is preferred?

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High voltage transmission results in lower current and hence lower heat loss. AC is preferred over DC because

The correct option is A Voltage level transformation is easier in AC at same power levels.Voltage level Transformation is easier in AC with the help of transformers.

The correct option is A Voltage level transformation is easier in AC at same power levels.
Voltage level Transformation is easier in AC with the help of transformers.